- bileA bitter brownish-yellow or greenish-yellow secretion produced by the liver, stored in the gall bladder, and discharged into the duodenum where it aids the process of digestion.
- bilinAny of various biological pigments formed in many organisms as a metabolic product of certain porphyrins.
- bili-Bile.
- bilifuscinA brownish-green pigment, derived from bilirubin, found in human gallstones and in old bile.
- biliprasinA dark green pigment found in small quantities in human gallstones.
- stercobilinA tetrapyrrolic bile pigment, one of the end products of heme catabolism, responsible for the brown colour of human faeces